JP2018037789A - Wireless LAN device and communication processing method - Google Patents

Wireless LAN device and communication processing method Download PDF

Info

Publication number
JP2018037789A
JP2018037789A JP2016168181A JP2016168181A JP2018037789A JP 2018037789 A JP2018037789 A JP 2018037789A JP 2016168181 A JP2016168181 A JP 2016168181A JP 2016168181 A JP2016168181 A JP 2016168181A JP 2018037789 A JP2018037789 A JP 2018037789A
Authority
JP
Japan
Prior art keywords
wireless lan
access point
lan access
response
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2016168181A
Other languages
Japanese (ja)
Other versions
JP6806498B2 (en
Inventor
俊一 角田
Shunichi Tsunoda
俊一 角田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allied Telesis Holdings KK
Original Assignee
Allied Telesis Holdings KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allied Telesis Holdings KK filed Critical Allied Telesis Holdings KK
Priority to JP2016168181A priority Critical patent/JP6806498B2/en
Publication of JP2018037789A publication Critical patent/JP2018037789A/en
Application granted granted Critical
Publication of JP6806498B2 publication Critical patent/JP6806498B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To detect a wireless LAN access point suitable for a wireless communication with a wireless LAN station so as not to hinder an operation of the wireless LAN access point as far as possible.SOLUTION: A wireless LAN controller 10 is connected to one wireless LAN access point 21 and other wireless LAN access points 22 and 23. The one wireless LAN access point 21 transmits a response request signal for requesting a response to a wireless LAN station 30 which wirelessly communicates with the one wireless access point. The other wireless LAN access points 22 and 23 start a stand-by for receiving the response in accordance with a transmission time point t0 of the response request signal. The wireless LAN controller 10 detects a wireless LAN access point 23 which has the highest reception signal strength from among the response reception signal strengths at the other wireless LAN access points 22 and 23 and the reception signal strength in the wireless communication at the one wireless LAN access point 21.SELECTED DRAWING: Figure 6

Description

本発明は、無線LAN(Local Area Network)ステーションが接続する無線LANアクセスポイントの選定に関する。   The present invention relates to selection of a wireless LAN access point connected to a wireless LAN (Local Area Network) station.

従来より、複数の無線LANアクセスポイントを有する無線LANが知られている。このような無線LANにおいては、無線LANステーションが、ある一つの無線LANアクセスポイントAと通信を行っている。ここで、無線LANステーションが移動して、無線LANアクセスポイントAから離れると、通信品質が低下する。かかる場合、無線LANステーションが、他の無線LANアクセスポイントBに接近していることがある。よって、無線LANアクセスポイントBと通信を行うようにすれば、通信品質の低下を防止できる。   Conventionally, a wireless LAN having a plurality of wireless LAN access points is known. In such a wireless LAN, a wireless LAN station communicates with a certain wireless LAN access point A. Here, when the wireless LAN station moves and moves away from the wireless LAN access point A, the communication quality deteriorates. In such a case, the wireless LAN station may be approaching another wireless LAN access point B. Therefore, if communication is performed with the wireless LAN access point B, it is possible to prevent a reduction in communication quality.

無線LANステーションが、無線LANアクセスポイントAから離れ、無線LANアクセスポイントBに接近していることを検知するための技術として、以下の工程1および工程2を有する方法が知られている(例えば、特許文献1の要約および図2を参照)。   As a technique for detecting that the wireless LAN station is away from the wireless LAN access point A and is approaching the wireless LAN access point B, a method having the following steps 1 and 2 is known (for example, (See Summary of Patent Document 1 and FIG. 2).

(工程1)無線LANステーションから、無線LANアクセスポイントAおよびBに向けて、定期的に信号を送信する。   (Step 1) A signal is periodically transmitted from the wireless LAN station to the wireless LAN access points A and B.

(工程2)無線LANアクセスポイントAおよびBが受信する信号の強度を比較する。   (Step 2) The strengths of the signals received by the wireless LAN access points A and B are compared.

なお、無線LANに関する従来技術として、他に、特許文献2〜5がある。   In addition, Patent Documents 2 to 5 are other conventional techniques related to the wireless LAN.

特開2010−93360号公報JP 2010-93360 A 特表2015−510738号公報JP-T-2015-510738 gazette 特表2008−538260号公報Special table 2008-538260 gazette 特開2006−67178号公報JP 2006-67178 A 特開2010−21765号公報JP 2010-21765 A

しかしながら、上記の従来技術によれば、複数の無線LANアクセスポイントが、いつ送信されてくるか分からない無線LANステーションからの信号を待ち続けなければならず、複数の無線LANアクセスポイントの運用に支障をきたす。   However, according to the above prior art, a plurality of wireless LAN access points must continue to wait for a signal from a wireless LAN station that does not know when it is transmitted, which hinders the operation of the plurality of wireless LAN access points. Bring

例えば、複数の無線LANアクセスポイントの各々は、無線空間の混雑を避けるため、異なるチャネルで無線通信サービスの提供を行うことが一般的である。この場合、複数の無線LANアクセスポイントの各々は、無線LANステーションからの信号を待つ間、無線LANステーションからの信号のチャネルに、各々のチャネルをあわせなければならず、無線通信サービスの提供を停止しなければならない。   For example, each of a plurality of wireless LAN access points generally provides a wireless communication service through a different channel in order to avoid congestion in the wireless space. In this case, each of the plurality of wireless LAN access points must match the channel of the signal from the wireless LAN station while waiting for the signal from the wireless LAN station, and stop providing the wireless communication service. Must.

そこで、本発明は、無線LANアクセスポイントの運用になるべく支障をきたさないように、無線LANステーションとの無線通信に適した無線LANアクセスポイントを検出することを課題とする。   Therefore, an object of the present invention is to detect a wireless LAN access point suitable for wireless communication with a wireless LAN station so as not to hinder the operation of the wireless LAN access point as much as possible.

本発明にかかる無線LAN装置は、ある一つの無線LANアクセスポイントであって、当該ある一つの無線LANアクセスポイントと無線通信を行っている無線LAN通信端末に対して、応答を要求する応答要求信号を送信するある一つの無線LANアクセスポイントと、前記ある一つの無線LANアクセスポイントとは別の無線LANアクセスポイントであって、前記応答の受信の待機を、前記応答要求信号の送信の時点に応じて開始する別の無線LANアクセスポイントとに接続された無線LAN装置であって、前記別の無線LANアクセスポイントの中で、前記ある一つの無線LANアクセスポイントにおける前記無線通信の際の受信信号強度よりも、前記応答の受信信号強度が強い無線LANアクセスポイントを検出する無線LANアクセスポイント検出部を備えるように構成される。   A wireless LAN device according to the present invention is a response request signal that requests a response to a wireless LAN communication terminal that is a wireless LAN access point and is performing wireless communication with the wireless LAN access point. A wireless LAN access point that is different from the one wireless LAN access point, and waits for reception of the response according to the time of transmission of the response request signal. A wireless LAN device connected to another wireless LAN access point that starts, the received signal strength at the time of the wireless communication at the one wireless LAN access point among the other wireless LAN access points A wireless LAN that detects a wireless LAN access point having a stronger received signal strength than the response Configured with the access point detection unit.

上記のように構成された無線LAN装置は、ある一つの無線LANアクセスポイントであって、当該ある一つの無線LANアクセスポイントと無線通信を行っている無線LAN通信端末に対して、応答を要求する応答要求信号を送信するある一つの無線LANアクセスポイントと、前記ある一つの無線LANアクセスポイントとは別の無線LANアクセスポイントであって、前記応答の受信の待機を、前記応答要求信号の送信の時点に応じて開始する別の無線LANアクセスポイントとに接続されている。無線LANアクセスポイント検出部は、前記別の無線LANアクセスポイントの中で、前記ある一つの無線LANアクセスポイントにおける前記無線通信の際の受信信号強度よりも、前記応答の受信信号強度が強い無線LANアクセスポイントを検出する。   The wireless LAN device configured as described above requests a response from a wireless LAN communication terminal that is a certain wireless LAN access point and performs wireless communication with the certain wireless LAN access point. A wireless LAN access point that transmits a response request signal, and a wireless LAN access point that is different from the one wireless LAN access point, and waits for reception of the response. It is connected to another wireless LAN access point that starts according to the time. The wireless LAN access point detection unit is a wireless LAN having a stronger received signal strength of the response than the received signal strength of the wireless communication at the one wireless LAN access point among the other wireless LAN access points. Detect access points.

なお、本発明にかかる無線LAN装置は、前記ある一つの無線LANアクセスポイントに、前記応答要求信号の送信を指示する送信指示部と、前記別の無線LANアクセスポイントに、前記応答の受信の待機を指示する受信待機指示部とを備えるようにしてもよい。   The wireless LAN device according to the present invention includes a transmission instruction unit that instructs the one wireless LAN access point to transmit the response request signal, and a standby state for receiving the response to the other wireless LAN access point. A reception standby instruction unit for instructing.

なお、本発明にかかる無線LAN装置は、前記応答の受信の待機が、前記応答要求信号の送信と同時に開始するようにしてもよい。   Note that the wireless LAN device according to the present invention may start waiting for reception of the response simultaneously with transmission of the response request signal.

なお、本発明にかかる無線LAN装置は、前記応答の受信の待機が、前記別の無線LANアクセスポイントによる前記応答の受信より前に開始するようにしてもよい。   The wireless LAN device according to the present invention may wait for the response to be received before the response is received by the other wireless LAN access point.

なお、本発明にかかる無線LAN装置は、前記応答の受信の待機は、前記別の無線LANアクセスポイントが前記応答のチャネルの信号を受信可能とすることであるようにしてもよい。   The wireless LAN device according to the present invention may wait for the response to be received by allowing the other wireless LAN access point to receive a signal of the response channel.

なお、本発明にかかる無線LAN装置は、前記応答要求信号は、ARP RequestまたはNull Dataであるようにしてもよい。   In the wireless LAN device according to the present invention, the response request signal may be ARP Request or Null Data.

なお、本発明にかかる無線LAN装置は、前記無線LANアクセスポイント検出部の検出結果が有る場合に、前記ある一つの無線LANアクセスポイントに対して、前記無線LAN通信端末との通信の切断を指示する通信切断指示部を備えるようにしてもよい。   The wireless LAN device according to the present invention instructs the one wireless LAN access point to disconnect communication with the wireless LAN communication terminal when there is a detection result of the wireless LAN access point detection unit. A communication disconnection instruction unit may be provided.

なお、本発明にかかる無線LAN装置は、前記無線LANアクセスポイント検出部の検出結果の内の一つを前記無線LAN通信端末に伝達するようにしてもよい。   The wireless LAN device according to the present invention may transmit one of detection results of the wireless LAN access point detection unit to the wireless LAN communication terminal.

本発明は、ある一つの無線LANアクセスポイントであって、当該ある一つの無線LANアクセスポイントと無線通信を行っている無線LAN通信端末に対して、応答を要求する応答要求信号を送信するある一つの無線LANアクセスポイントと、前記ある一つの無線LANアクセスポイントとは別の無線LANアクセスポイントであって、前記応答の受信の待機を、前記応答要求信号の送信の時点に応じて開始する別の無線LANアクセスポイントとに接続された無線LAN装置における通信処理方法であって、前記別の無線LANアクセスポイントの中で、前記ある一つの無線LANアクセスポイントにおける前記無線通信の際の受信信号強度よりも、前記応答の受信信号強度が強い無線LANアクセスポイントを検出する無線LANアクセスポイント検出工程を備えた通信処理方法である。   The present invention transmits a response request signal for requesting a response to a wireless LAN communication terminal that is a certain wireless LAN access point and is performing wireless communication with the certain wireless LAN access point. One wireless LAN access point and another wireless LAN access point different from the one wireless LAN access point, wherein the reception of the response is started according to the time of transmission of the response request signal. A communication processing method in a wireless LAN device connected to a wireless LAN access point, the received signal strength at the time of the wireless communication in the one wireless LAN access point among the other wireless LAN access points A wireless LAN access point that detects a wireless LAN access point with a strong received signal strength of the response. A communication processing method with Seth point detection process.

本発明の実施形態にかかる無線LANシステムを示す図である。1 is a diagram showing a wireless LAN system according to an embodiment of the present invention. 本発明の実施形態にかかる無線LANコントローラ(無線LAN装置)10の構成を示す機能ブロック図である。1 is a functional block diagram showing a configuration of a wireless LAN controller (wireless LAN device) 10 according to an embodiment of the present invention. 本発明の実施形態にかかる無線LANシステムの動作を示すフローチャートである。It is a flowchart which shows operation | movement of the wireless LAN system concerning embodiment of this invention. 本発明の実施形態にかかる無線LANシステムの動作を示すタイミングチャートである。5 is a timing chart showing an operation of the wireless LAN system according to the embodiment of the present invention. 本発明の実施形態にかかる無線LANシステムのタイミングt0より前の動作を示す機能ブロック図である。It is a functional block diagram which shows the operation | movement before the timing t0 of the wireless LAN system concerning embodiment of this invention. 本発明の実施形態にかかる無線LANシステムのタイミングt0における動作を示す機能ブロック図である。It is a functional block diagram which shows the operation | movement in the timing t0 of the wireless LAN system concerning embodiment of this invention. 本発明の実施形態にかかる無線LANシステムのタイミングt0より後における動作を示す機能ブロック図である。It is a functional block diagram which shows the operation | movement after the timing t0 of the wireless LAN system concerning embodiment of this invention. 本発明の実施形態にかかる無線LANシステムのタイミングt0より後(ただし、受信信号強度の比較より後)における動作を示す機能ブロック図である。It is a functional block diagram which shows operation | movement after the timing t0 (however, after comparison of a received signal strength) of the wireless LAN system concerning embodiment of this invention.

以下、本発明の実施形態を図面を参照しながら説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図1は、本発明の実施形態にかかる無線LANシステムを示す図である。   FIG. 1 is a diagram showing a wireless LAN system according to an embodiment of the present invention.

本発明の実施形態にかかる無線LANシステムは、無線LANコントローラ10および無線LANアクセスポイント21、22、23、無線LANステーション30を備える。なお、図面においては、「無線LAN」の表記を省略し、コントローラ10、アクセスポイント21、22、23およびステーション30と表記する。   The wireless LAN system according to the embodiment of the present invention includes a wireless LAN controller 10, wireless LAN access points 21, 22 and 23, and a wireless LAN station 30. In the drawing, the notation of “wireless LAN” is omitted, and the controller 10, the access points 21, 22, 23, and the station 30 are indicated.

無線LANステーション(無線LAN通信端末)30は、無線LANシステムにおいて無線通信を行う端末である。無線LANステーション30は、ある一つの無線LANアクセスポイント21と無線通信を行っている。ある一つの無線LANアクセスポイント21は、無線LANステーション30に対して、応答を要求する応答要求信号(例えば、ARP RequestまたはNull Dataである)を送信する。なお、応答要求信号がARP Requestである場合は、応答はARP Replyであり、応答要求信号がNull Dataである場合は、応答はAckフレームである。   A wireless LAN station (wireless LAN communication terminal) 30 is a terminal that performs wireless communication in a wireless LAN system. The wireless LAN station 30 performs wireless communication with a certain wireless LAN access point 21. One wireless LAN access point 21 transmits a response request signal (for example, ARP Request or Null Data) requesting a response to the wireless LAN station 30. When the response request signal is ARP Request, the response is ARP Reply. When the response request signal is Null Data, the response is an Ack frame.

無線LANアクセスポイント(別の無線LANアクセスポイント)22、23は、ある一つの無線LANアクセスポイント21とは別の無線LANアクセスポイントである。別の無線LANアクセスポイント22、23は、応答の受信の待機を、応答要求信号の送信の時点に応じて開始する。例えば、別の無線LANアクセスポイント22、23は、応答の受信の待機を、応答要求信号の送信と同時(例えば、タイミングt0)に開始する。   The wireless LAN access points (different wireless LAN access points) 22 and 23 are wireless LAN access points different from a certain wireless LAN access point 21. The other wireless LAN access points 22 and 23 start to wait for reception of a response according to the time when the response request signal is transmitted. For example, the other wireless LAN access points 22 and 23 start waiting for reception of a response simultaneously with transmission of the response request signal (for example, at timing t0).

なお、無線LANアクセスポイント21、22、23は、各々が、別々のチャネルの信号を送受信している。これにより、各々の無線LANアクセスポイント21、22、23どうしの無線空間の混雑を回避するようにしている。   Each of the wireless LAN access points 21, 22, and 23 transmits and receives signals of different channels. As a result, the wireless space between the wireless LAN access points 21, 22, 23 is avoided.

また、応答の受信の待機は、別の無線LANアクセスポイント22、23が応答のチャネル(ある一つの無線LANアクセスポイント21が送受信に使用しているチャネルである)の信号を受信可能とすることである。例えば、別の無線LANアクセスポイント22、23が、ある一つの無線LANアクセスポイント21が送受信に使用しているチャネルにてプロミスキャスモードでのRFスキャンを行うことが、応答の受信の待機に相当する。   Further, in the standby state for receiving a response, another wireless LAN access point 22, 23 can receive a signal of a response channel (a channel used by one wireless LAN access point 21 for transmission / reception). It is. For example, when another wireless LAN access point 22 or 23 performs RF scan in promiscuous mode on a channel used by one wireless LAN access point 21 for transmission / reception, it corresponds to waiting for reception of a response. To do.

さらに、無線LANステーション30に近い順に、別の無線LANアクセスポイント23、ある一つの無線LANアクセスポイント21、別の無線LANアクセスポイント22が配置されている。別の無線LANアクセスポイント23が、無線LANステーション30に最も近い。   Further, another wireless LAN access point 23, one certain wireless LAN access point 21, and another wireless LAN access point 22 are arranged in the order closer to the wireless LAN station 30. Another wireless LAN access point 23 is closest to the wireless LAN station 30.

無線LANコントローラ(無線LAN装置)10は、ある一つの無線LANアクセスポイント21および別の無線LANアクセスポイント22、23にLANケーブルにより接続されている。無線LANコントローラ10は、ある一つの無線LANアクセスポイント21および別の無線LANアクセスポイント22、23と有線通信を行う。   The wireless LAN controller (wireless LAN device) 10 is connected to a certain wireless LAN access point 21 and other wireless LAN access points 22 and 23 by a LAN cable. The wireless LAN controller 10 performs wired communication with a certain wireless LAN access point 21 and other wireless LAN access points 22 and 23.

図2は、本発明の実施形態にかかる無線LANコントローラ(無線LAN装置)10の構成を示す機能ブロック図である。本発明の実施形態にかかる無線LANコントローラ(無線LAN装置)10は、タイミング指定部11、送信指示部13、受信待機指示部15、RSSI記録部12、RSSI受信部14、RSSI比較部(無線LANアクセスポイント検出部)16、候補選択部17、通信切断指示部18を備える。   FIG. 2 is a functional block diagram showing the configuration of the wireless LAN controller (wireless LAN device) 10 according to the embodiment of the present invention. A wireless LAN controller (wireless LAN device) 10 according to an embodiment of the present invention includes a timing designation unit 11, a transmission instruction unit 13, a reception standby instruction unit 15, an RSSI recording unit 12, an RSSI reception unit 14, an RSSI comparison unit (wireless LAN). (Access point detection unit) 16, candidate selection unit 17, and communication disconnection instruction unit 18.

タイミング指定部11は、応答要求信号の送信および応答の受信の待機開始の時点であるタイミングt0を送信指示部13および受信待機指示部15に与える。   The timing designating unit 11 provides the transmission instruction unit 13 and the reception standby instruction unit 15 with a timing t0 that is a time point when the transmission of the response request signal and the reception of the response is started.

送信指示部13は、ある一つの無線LANアクセスポイント21に、応答要求信号の送信を指示する。なお、この指示にはタイミングt0を含めており、ある一つの無線LANアクセスポイント21は、このタイミングt0の時点で応答要求信号の送信を行う。   The transmission instruction unit 13 instructs a certain wireless LAN access point 21 to transmit a response request signal. Note that this instruction includes the timing t0, and one wireless LAN access point 21 transmits a response request signal at the timing t0.

受信待機指示部15は、別の無線LANアクセスポイント22、23に、応答の受信の待機を指示する。なお、この指示にはタイミングt0を含めており、別の無線LANアクセスポイント22、23は、このタイミングt0の時点で応答の受信の待機を開始する。   The reception standby instruction unit 15 instructs another wireless LAN access point 22, 23 to wait for reception of a response. Note that this instruction includes the timing t0, and the other wireless LAN access points 22 and 23 start waiting for reception of a response at the timing t0.

RSSI記録部12は、ある一つの無線LANアクセスポイント21における無線LANステーション30との無線通信の際の受信信号強度(RSSI:Received Signal Strength Indicator)を記録する。なお、受信信号強度は、ある一つの無線LANアクセスポイント21と無線LANステーション30との無線通信の際に、ある一つの無線LANアクセスポイント21により測定しておく。   The RSSI recording unit 12 records a received signal strength indicator (RSSI) at the time of wireless communication with a wireless LAN station 30 at a certain wireless LAN access point 21. The received signal strength is measured by a certain wireless LAN access point 21 during wireless communication between the certain wireless LAN access point 21 and the wireless LAN station 30.

RSSI受信部14は、別の無線LANアクセスポイント22、23における応答の受信信号強度を受信する。なお、受信信号強度は、別の無線LANアクセスポイント22、23において応答を受信した際に測定したものを、別の無線LANアクセスポイント22、23から受信する。   The RSSI receiver 14 receives the received signal strength of the response at the other wireless LAN access points 22 and 23. The received signal strength is measured from the other wireless LAN access points 22 and 23 as measured when the response is received by the other wireless LAN access points 22 and 23.

RSSI比較部(無線LANアクセスポイント検出部)16は、RSSI受信部14から受けた別の無線LANアクセスポイント22、23における応答の受信信号強度と、RSSI記録部12に記録されたある一つの無線LANアクセスポイント21における無線通信の際の受信信号強度とを比較する。この比較結果に基づき、RSSI比較部16は、別の無線LANアクセスポイント22、23の中で、ある一つの無線LANアクセスポイント21における無線通信の際の受信信号強度よりも、応答の受信信号強度が強い無線LANアクセスポイントを検出する。図1の例でいえば、検出結果は、別の無線LANアクセスポイント23となる。   The RSSI comparison unit (wireless LAN access point detection unit) 16 receives the received signal strength of the response at the other wireless LAN access points 22 and 23 received from the RSSI reception unit 14 and one wireless recorded in the RSSI recording unit 12. The received signal strength at the time of wireless communication at the LAN access point 21 is compared. Based on the comparison result, the RSSI comparing unit 16 determines that the received signal strength of the response is higher than the received signal strength at the time of wireless communication at one wireless LAN access point 21 among the other wireless LAN access points 22 and 23. Detects a strong wireless LAN access point. In the example of FIG. 1, the detection result is another wireless LAN access point 23.

候補選択部17は、RSSI比較部16による検出結果を受け、いずれか一つを選択して、通信切断指示部18に与える。候補選択部17は、例えば、RSSI比較部16による検出結果のうち、応答の受信信号強度が最強なものを選択する。図1の例でいえば、RSSI比較部16による検出結果は別の無線LANアクセスポイント23しかないので、候補選択部17は別の無線LANアクセスポイント23を選択する。   The candidate selection unit 17 receives the detection result from the RSSI comparison unit 16, selects one of them, and gives it to the communication disconnection instruction unit 18. The candidate selection unit 17 selects, for example, the one with the strongest received signal strength of the response from the detection results by the RSSI comparison unit 16. In the example of FIG. 1, since the detection result by the RSSI comparison unit 16 is only another wireless LAN access point 23, the candidate selection unit 17 selects another wireless LAN access point 23.

通信切断指示部18は、候補選択部17が何らかの候補を選択した場合(RSSI比較部16による検出結果が有ることを意味する)に、ある一つの無線LANアクセスポイント21に対して、無線LANステーション(無線LAN通信端末)30との通信の切断を指示する。なお、通信切断指示部18は、候補選択部17の選択した候補(RSSI比較部16による検出結果の内の一つである)を無線LANステーション30に伝達してもよい。   When the candidate selection unit 17 selects any candidate (meaning that there is a detection result by the RSSI comparison unit 16), the communication disconnection instruction unit 18 sends a wireless LAN station to a certain wireless LAN access point 21. Instructs disconnection of communication with (wireless LAN communication terminal) 30. The communication disconnection instruction unit 18 may transmit the candidate selected by the candidate selection unit 17 (one of the detection results by the RSSI comparison unit 16) to the wireless LAN station 30.

次に、本発明の実施形態の動作を説明する。   Next, the operation of the embodiment of the present invention will be described.

図3は、本発明の実施形態にかかる無線LANシステムの動作を示すフローチャートである。なお、図3においては、無線LANコントローラ10、ある一つの無線LANアクセスポイント21、別の無線LANアクセスポイント22、23、無線LANステーション30に分けて動作を図示している。   FIG. 3 is a flowchart showing the operation of the wireless LAN system according to the embodiment of the present invention. In FIG. 3, the operation is illustrated separately for the wireless LAN controller 10, one wireless LAN access point 21, other wireless LAN access points 22 and 23, and the wireless LAN station 30.

図4は、本発明の実施形態にかかる無線LANシステムの動作を示すタイミングチャートである。なお、図4においては、無線LANコントローラ10、ある一つの無線LANアクセスポイント21、別の無線LANアクセスポイント22、別の無線LANアクセスポイント23、無線LANステーション30に分けて動作を図示している。   FIG. 4 is a timing chart showing the operation of the wireless LAN system according to the embodiment of the present invention. In FIG. 4, the operation is illustrated separately for the wireless LAN controller 10, one wireless LAN access point 21, another wireless LAN access point 22, another wireless LAN access point 23, and a wireless LAN station 30. .

まず、タイミングt0より前の動作を説明する。   First, the operation before the timing t0 will be described.

図5は、本発明の実施形態にかかる無線LANシステムのタイミングt0より前の動作を示す機能ブロック図である。   FIG. 5 is a functional block diagram showing an operation before timing t0 of the wireless LAN system according to the embodiment of the present invention.

まず、無線LANコントローラ10の送信指示部13が、ある一つの無線LANアクセスポイント21に、応答要求信号(例えば、ARP RequestまたはNull Dataである)の送信を指示する(S10)。ある一つの無線LANアクセスポイント21は、送信指示(S10)を無線LANコントローラ10から、有線通信により受信する(S20)。送信指示(S10)と指示受信(S20)とはほぼ同時である。   First, the transmission instruction unit 13 of the wireless LAN controller 10 instructs a certain wireless LAN access point 21 to transmit a response request signal (for example, ARP Request or Null Data) (S10). One wireless LAN access point 21 receives a transmission instruction (S10) from the wireless LAN controller 10 by wired communication (S20). The transmission instruction (S10) and the instruction reception (S20) are almost simultaneous.

なお、送信指示(S10)には、タイミング指定部11により指定されたタイミングt0(すなわち、応答要求信号の送信の時点)が含まれている。   The transmission instruction (S10) includes the timing t0 designated by the timing designation unit 11 (that is, the time when the response request signal is transmitted).

その後、無線LANコントローラ10の受信待機指示部15が、別の無線LANアクセスポイント22、23に、応答の受信の待機を指示する(S12)。別の無線LANアクセスポイント22、23は、受信待機指示(S12)を無線LANコントローラ10から、有線通信により受信する(S30)。受信待機指示(S12)と指示受信(S30)とはほぼ同時である。   Thereafter, the reception standby instruction unit 15 of the wireless LAN controller 10 instructs another wireless LAN access point 22, 23 to wait for reception of a response (S12). The other wireless LAN access points 22 and 23 receive the reception standby instruction (S12) from the wireless LAN controller 10 by wired communication (S30). The reception standby instruction (S12) and the instruction reception (S30) are almost simultaneous.

なお、受信待機指示(S12)には、タイミング指定部11により指定されたタイミングt0(すなわち、応答の受信の待機開始の時点)が含まれている。   The reception standby instruction (S12) includes the timing t0 designated by the timing designation unit 11 (that is, the time point when the response reception standby is started).

やがて、時間が経過し、タイミングt0が到来する。   Eventually, time elapses and timing t0 arrives.

図6は、本発明の実施形態にかかる無線LANシステムのタイミングt0における動作を示す機能ブロック図である。   FIG. 6 is a functional block diagram showing an operation at timing t0 of the wireless LAN system according to the embodiment of the present invention.

ある一つの無線LANアクセスポイント21は、無線LANステーション30に対して、応答要求信号を送信する(S22)。それと同時に、別の無線LANアクセスポイント22、23は、応答の受信の待機を開始する(S32)。   One wireless LAN access point 21 transmits a response request signal to the wireless LAN station 30 (S22). At the same time, the other wireless LAN access points 22 and 23 start to wait for a response (S32).

応答要求信号は、タイミングt0より後に、無線LANステーション30により受信される。   The response request signal is received by the wireless LAN station 30 after the timing t0.

図7は、本発明の実施形態にかかる無線LANシステムのタイミングt0より後における動作を示す機能ブロック図である。   FIG. 7 is a functional block diagram showing an operation after timing t0 of the wireless LAN system according to the embodiment of the present invention.

無線LANステーション30は、応答要求信号を受信すると、応答信号(例えば、ARP ReplyまたはAckフレームである)を送信する(S40)。応答信号は、別の無線LANアクセスポイント22、23により受信される(S34)。別の無線LANアクセスポイント22の方が、別の無線LANアクセスポイント23よりも、無線LANステーション30から見て遠いが、応答信号の伝搬速度はほぼ光速であるため、別の無線LANアクセスポイント22による応答の受信(S34)も、別の無線LANアクセスポイント23による応答の受信(S34)もほぼ同時となる。   When receiving the response request signal, the wireless LAN station 30 transmits a response signal (for example, an ARP Reply or an Ack frame) (S40). The response signal is received by another wireless LAN access point 22, 23 (S34). The other wireless LAN access point 22 is farther from the wireless LAN station 30 than the other wireless LAN access point 23, but the propagation speed of the response signal is almost the light speed. The response reception by the wireless LAN access point 23 (S34) and the reception of the response by another wireless LAN access point 23 (S34) are almost the same.

別の無線LANアクセスポイント22、23は、それぞれ、受信(S34)した応答の受信信号強度(RSSI)を測定する(S36)。測定された受信信号強度(RSSI)は、無線LANコントローラ10に向けて送信され、無線LANコントローラ10のRSSI受信部14により受信される(S14)。   Each of the other wireless LAN access points 22 and 23 measures the received signal strength (RSSI) of the received response (S34) (S36). The measured received signal strength (RSSI) is transmitted toward the wireless LAN controller 10 and received by the RSSI receiver 14 of the wireless LAN controller 10 (S14).

RSSI受信部14により受信された受信信号強度(RSSI)(別の無線LANアクセスポイント22、23により測定されたもの)は、RSSI記録部12に記録された受信信号強度(RSSI)(ある一つの無線LANアクセスポイント21により測定されたもの)と比較される。   The received signal strength (RSSI) received by the RSSI receiving unit 14 (measured by another wireless LAN access point 22, 23) is the received signal strength (RSSI) recorded in the RSSI recording unit 12 (a certain one Measured by the wireless LAN access point 21).

図8は、本発明の実施形態にかかる無線LANシステムのタイミングt0より後(ただし、受信信号強度の比較より後)における動作を示す機能ブロック図である。   FIG. 8 is a functional block diagram showing the operation after the timing t0 (but after the comparison of the received signal strength) of the wireless LAN system according to the embodiment of the present invention.

無線LANコントローラ10のRSSI受信部14により受信された受信信号強度(RSSI)(別の無線LANアクセスポイント22、23により測定されたもの)と、RSSI記録部12に記録された受信信号強度(RSSI)(ある一つの無線LANアクセスポイント21により測定されたもの)とは、RSSI比較部(無線LANアクセスポイント検出部)16に与えられる。   Received signal strength (RSSI) received by the RSSI receiving unit 14 of the wireless LAN controller 10 (measured by another wireless LAN access point 22, 23) and received signal strength (RSSI) recorded in the RSSI recording unit 12 ) (Measured by a certain wireless LAN access point 21) is provided to the RSSI comparison unit (wireless LAN access point detection unit) 16.

RSSI比較部16は、RSSI受信部14により受信された受信信号強度(RSSI)と、RSSI記録部12に記録された受信信号強度(RSSI)とを比較する(S16)。RSSI比較部16は、さらに、この比較結果に基づき、別の無線LANアクセスポイント22、23の中で、ある一つの無線LANアクセスポイント21における無線通信の際の受信信号強度よりも、応答の受信信号強度が強い無線LANアクセスポイントを検出する。図1の例でいえば、RSSI比較部16は、別の無線LANアクセスポイント23を検出する。そして、候補選択部17が、別の無線LANアクセスポイント23を選択する。   The RSSI comparison unit 16 compares the received signal strength (RSSI) received by the RSSI receiving unit 14 with the received signal strength (RSSI) recorded in the RSSI recording unit 12 (S16). The RSSI comparison unit 16 further receives a response based on the comparison result, compared to the received signal strength at the time of wireless communication at one wireless LAN access point 21 among the other wireless LAN access points 22 and 23. A wireless LAN access point with strong signal strength is detected. In the example of FIG. 1, the RSSI comparison unit 16 detects another wireless LAN access point 23. Then, the candidate selection unit 17 selects another wireless LAN access point 23.

無線LANコントローラ10の通信切断指示部18は、候補選択部17から選択された候補である別の無線LANアクセスポイント23を受け、ある一つの無線LANアクセスポイント21に対して、無線LANステーション30との通信の切断を指示する(S18)。ある一つの無線LANアクセスポイント21は、無線LANステーション30との無線通信を切断する(S24)。   The communication disconnection instructing unit 18 of the wireless LAN controller 10 receives another wireless LAN access point 23 that is a candidate selected from the candidate selecting unit 17, and transmits a wireless LAN station 30 to a certain wireless LAN access point 21. Is instructed to disconnect the communication (S18). One wireless LAN access point 21 disconnects wireless communication with the wireless LAN station 30 (S24).

その後、無線LANステーション30はローミングにより、最も近い別の無線LANアクセスポイント23との無線通信を確立する。   Thereafter, the wireless LAN station 30 establishes wireless communication with another nearest wireless LAN access point 23 by roaming.

ただし、通信切断指示部18が、無線LANステーション30に、新たに無線通信を確立すべき候補である別の無線LANアクセスポイント23を伝達してもよい。この場合、無線LANステーション30は、別の無線LANアクセスポイント23と無線通信を試み、無線通信を確立する。   However, the communication disconnection instruction unit 18 may transmit to the wireless LAN station 30 another wireless LAN access point 23 that is a candidate for newly establishing wireless communication. In this case, the wireless LAN station 30 attempts wireless communication with another wireless LAN access point 23 and establishes wireless communication.

本発明の実施形態によれば、別の無線LANアクセスポイント22、23の運用になるべく支障をきたさないように、無線LANステーション30との無線通信に適した無線LANアクセスポイント23を検出することができる。   According to the embodiment of the present invention, it is possible to detect the wireless LAN access point 23 suitable for wireless communication with the wireless LAN station 30 so as not to hinder the operation of the other wireless LAN access points 22 and 23 as much as possible. it can.

すなわち、別の無線LANアクセスポイント22、23は、受信待機(S32)の開始から応答の受信(S34)までのわずかな時間だけ応答のチャネル(ある一つの無線LANアクセスポイント21が送受信に使用しているチャネルである)の信号を受信可能とすればよい。別の無線LANアクセスポイント22、23を通常の運用(ある一つの無線LANアクセスポイント21が送受信に使用しているチャネルとは「別の」チャネルで送受信を行っている)に供することができないのは、このわずかな時間に過ぎず、運用にほとんど支障をきたさない。   That is, the other wireless LAN access points 22 and 23 use a response channel (a certain wireless LAN access point 21 is used for transmission / reception only for a short time from the start of reception standby (S32) to reception of a response (S34)). It is only necessary to be able to receive the signal of the channel being The other wireless LAN access points 22 and 23 cannot be used for normal operation (transmitting / receiving on a channel different from the channel used by one wireless LAN access point 21 for transmission / reception). This is just a little time, and there is little trouble in operation.

なお、別の無線LANアクセスポイント22、23が、応答の受信の待機を、ある一つの無線LANアクセスポイント21からの応答要求信号の送信の時点に応じて開始する(例えば、同時に開始)ことができるのであれば、タイミング指定部11、送信指示部13および受信待機指示部15は無くてもかまわない。例えば、ある一つの無線LANアクセスポイント21が応答要求信号の送信の時点を決定して、別の無線LANアクセスポイント22、23に知らせるようにしてもよい。または、別の無線LANアクセスポイント22、23が応答の受信の待機の開始時点を決定して、ある一つの無線LANアクセスポイント21に知らせるようにしてもよい。   Note that another wireless LAN access point 22 or 23 may start waiting for reception of a response according to the time of transmission of a response request signal from one wireless LAN access point 21 (for example, start simultaneously). If possible, the timing designation unit 11, the transmission instruction unit 13, and the reception standby instruction unit 15 may be omitted. For example, one wireless LAN access point 21 may determine the time of transmission of the response request signal and notify the other wireless LAN access points 22 and 23. Alternatively, another wireless LAN access point 22 or 23 may determine the start point of reception of a response and notify a certain wireless LAN access point 21.

また、本発明の実施形態においては、応答の受信の待機を、応答要求信号の送信の時点t0と同時に開始していたが、必ずしも同時でなくてもよい。応答の受信の待機を、応答要求信号の送信の時点t0に応じて開始すればよい。   Further, in the embodiment of the present invention, the waiting for reception of the response is started at the same time as the response request signal transmission time t0. Waiting for reception of a response may be started in accordance with the time t0 when the response request signal is transmitted.

例えば、応答の受信の待機を、ある一つの無線LANアクセスポイント21からの応答要求信号の送信の時点t0よりも後で、別の無線LANアクセスポイント22、23による応答の受信よりも前に開始するようにしてもよい。   For example, waiting for reception of a response is started after a response request signal transmission from one wireless LAN access point 21 and before reception of a response by another wireless LAN access point 22, 23. You may make it do.

または、応答の受信の待機を、ある一つの無線LANアクセスポイント21からの応答要求信号の送信の時点t0よりも少し前に開始するようにしてもよい。ただし、タイミングt0よりもあまりにも前過ぎると、別の無線LANアクセスポイント22、23の通常の運用に支障をきたすので、応答の受信の待機をタイミングt0より「少し」前に開始するようにする。   Alternatively, standby for reception of a response may be started slightly before the time t0 of transmission of a response request signal from a certain wireless LAN access point 21. However, if the time is too much before the timing t0, the normal operation of the other wireless LAN access points 22 and 23 will be hindered, so that waiting for reception of the response is started “a little” before the timing t0. .

なお、本実施形態においては、無線LANステーション30に近い順に、別の無線LANアクセスポイント23(無線LANステーション30に最も近い)、ある一つの無線LANアクセスポイント21、別の無線LANアクセスポイント22が配置されていることとしている。しかし、位置関係は必ずしもこれに限定されない。   In the present embodiment, another wireless LAN access point 23 (closest to the wireless LAN station 30), one wireless LAN access point 21, and another wireless LAN access point 22 are arranged in the order of proximity to the wireless LAN station 30. It is supposed to be arranged. However, the positional relationship is not necessarily limited to this.

(1)ある一つの無線LANアクセスポイント21が最も遠い場合
例えば、無線LANステーション30に近い順に、別の無線LANアクセスポイント23(無線LANステーション30に最も近い)、別の無線LANアクセスポイント22、ある一つの無線LANアクセスポイント21が配置されている場合もありうる。このような場合、別の無線LANアクセスポイント23のみならず別の無線LANアクセスポイント22の応答の受信信号強度も、ある一つの無線LANアクセスポイント21における無線通信の際の受信信号強度よりも強い。よって、別の無線LANアクセスポイント22および23がRSSI比較部16による検出結果となる。候補選択部17は、応答の受信信号強度が最強である別の無線LANアクセスポイント23を選択することとなる。
(1) When one wireless LAN access point 21 is farthest For example, in order of proximity to the wireless LAN station 30, another wireless LAN access point 23 (closest to the wireless LAN station 30), another wireless LAN access point 22, There may be a case where a certain wireless LAN access point 21 is arranged. In such a case, the received signal strength of the response of not only another wireless LAN access point 23 but also another wireless LAN access point 22 is stronger than the received signal strength at the time of wireless communication at a certain wireless LAN access point 21. . Therefore, the other wireless LAN access points 22 and 23 are detected by the RSSI comparator 16. The candidate selection unit 17 selects another wireless LAN access point 23 having the strongest received signal strength of the response.

(2)ある一つの無線LANアクセスポイント21が最も近い場合
例えば、無線LANステーション30に近い順に、ある一つの無線LANアクセスポイント21(無線LANステーション30に最も近い)、別の無線LANアクセスポイント23、別の無線LANアクセスポイント22が配置されている場合もありうる。このような場合、別の無線LANアクセスポイント22および23の応答の受信信号強度が、ある一つの無線LANアクセスポイント21における無線通信の際の受信信号強度よりも弱い。よって、RSSI比較部16による検出結果は無いこととなる。候補選択部17は、候補を選択することは無い。なお、候補選択部17が何の候補も選択しない場合は、通信切断指示部18により通信切断の指示は行われない。
(2) When a certain wireless LAN access point 21 is closest, for example, in order of increasing proximity to the wireless LAN station 30, one wireless LAN access point 21 (closest to the wireless LAN station 30) and another wireless LAN access point 23 Another wireless LAN access point 22 may be arranged. In such a case, the received signal strength of the response of the other wireless LAN access points 22 and 23 is weaker than the received signal strength at the time of wireless communication at a certain wireless LAN access point 21. Therefore, there is no detection result by the RSSI comparison unit 16. The candidate selection unit 17 does not select a candidate. When the candidate selection unit 17 selects no candidate, the communication disconnection instruction unit 18 does not instruct communication disconnection.

また、本実施形態においては、候補選択部17が、RSSI比較部16による検出結果のうち、応答の受信信号強度が最強なものを選択することとしていた。しかし、候補選択部17が、RSSI比較部16による検出結果のうちのいずれか一つを選択すればよく、上記の選択法に限定しなくてもよい。例えば、混雑している別の無線LANアクセスポイントを除いて最強の受信信号強度の別の無線LANアクセスポイントを選んでもよい。   Further, in the present embodiment, the candidate selection unit 17 selects the detection result from the RSSI comparison unit 16 that has the strongest received signal strength of the response. However, the candidate selection unit 17 may select any one of the detection results by the RSSI comparison unit 16, and is not limited to the selection method described above. For example, another wireless LAN access point having the strongest received signal strength may be selected except for another wireless LAN access point that is congested.

(1)ある一つの無線LANアクセスポイント21が最も遠い場合、すなわち、無線LANステーション30に近い順に、別の無線LANアクセスポイント23(無線LANステーション30に最も近い)、別の無線LANアクセスポイント22、ある一つの無線LANアクセスポイント21が配置されている場合を例にとって、候補選択部17のさらなる候補の選択法を説明する。   (1) When one wireless LAN access point 21 is farthest, that is, in order of proximity to the wireless LAN station 30, another wireless LAN access point 23 (closest to the wireless LAN station 30), another wireless LAN access point 22 Taking a case where a certain wireless LAN access point 21 is arranged as an example, a method for selecting further candidates by the candidate selecting unit 17 will be described.

ここで、別の無線LANアクセスポイント23は混雑している一方で、別の無線LANアクセスポイント22は混雑していないものとする。すると、混雑している無線LANアクセスポイント23を除いて最強の受信信号強度の無線LANアクセスポイントは、無線LANアクセスポイント22であり、この無線LANアクセスポイント22を候補選択部17が選ぶ。   Here, it is assumed that another wireless LAN access point 23 is congested while another wireless LAN access point 22 is not congested. Then, the wireless LAN access point having the strongest received signal strength except for the congested wireless LAN access point 23 is the wireless LAN access point 22, and the candidate selection unit 17 selects this wireless LAN access point 22.

ただし、混雑しているか否かは、別の無線LANアクセスポイントに接続している無線LANステーションの台数が所定の閾値を超えるか否かにより判断してもよい。または、(別の無線LANアクセスポイントの通信量(bps))/(別の無線LANアクセスポイントが通信し得る最大の通信量(bps))が所定の閾値を超えるか否かにより判断してもよい。   However, whether or not it is congested may be determined based on whether or not the number of wireless LAN stations connected to another wireless LAN access point exceeds a predetermined threshold. Alternatively, the determination may be made based on whether (the amount of communication (bps) of another wireless LAN access point) / (the maximum amount of communication (bps) that another wireless LAN access point can communicate) exceeds a predetermined threshold value. Good.

また、上記の実施形態は、以下のようにして実現できる。CPU、ハードディスク、メディア(フロッピー(登録商標)ディスク、CD−ROMなど)読み取り装置を備えたコンピュータに、上記の各部分、例えば無線LANコントローラ10または無線LANアクセスポイント21、22、23の各部分を実現するプログラムを記録したメディアを読み取らせて、ハードディスクにインストールする。このような方法でも、上記の機能を実現できる。   Moreover, said embodiment is realizable as follows. A computer having a CPU, a hard disk, and a medium (floppy (registered trademark) disk, CD-ROM, etc.) reader is connected to each of the above-described parts, for example, each part of the wireless LAN controller 10 or the wireless LAN access points 21, 22, 23. Read the media that records the program to be implemented and install it on the hard disk. Such a method can also realize the above functions.

10 無線LANコントローラ(無線LAN装置)
11 タイミング指定部
t0 タイミング
13 送信指示部
15 受信待機指示部
12 RSSI記録部
14 RSSI受信部
16 RSSI比較部(無線LANアクセスポイント検出部)
17 候補選択部
18 通信切断指示部
21 ある一つの無線LANアクセスポイント
22、23 別の無線LANアクセスポイント
30 無線LANステーション(無線LAN通信端末)
10 Wireless LAN controller (wireless LAN device)
11 Timing designation unit t0 Timing 13 Transmission instruction unit 15 Reception standby instruction unit 12 RSSI recording unit 14 RSSI reception unit 16 RSSI comparison unit (wireless LAN access point detection unit)
17 Candidate selection unit 18 Communication disconnection instruction unit 21 One wireless LAN access point 22, 23 Another wireless LAN access point 30 Wireless LAN station (wireless LAN communication terminal)

Claims (9)

ある一つの無線LANアクセスポイントであって、当該ある一つの無線LANアクセスポイントと無線通信を行っている無線LAN通信端末に対して、応答を要求する応答要求信号を送信するある一つの無線LANアクセスポイントと、
前記ある一つの無線LANアクセスポイントとは別の無線LANアクセスポイントであって、前記応答の受信の待機を、前記応答要求信号の送信の時点に応じて開始する別の無線LANアクセスポイントと、
に接続された無線LAN装置であって、
前記別の無線LANアクセスポイントの中で、前記ある一つの無線LANアクセスポイントにおける前記無線通信の際の受信信号強度よりも、前記応答の受信信号強度が強い無線LANアクセスポイントを検出する無線LANアクセスポイント検出部を備えた無線LAN装置。
A certain wireless LAN access point that transmits a response request signal for requesting a response to a wireless LAN communication terminal that is performing wireless communication with the certain wireless LAN access point. Point and
A wireless LAN access point different from the one wireless LAN access point, wherein another wireless LAN access point that starts waiting for reception of the response according to the time of transmission of the response request signal;
A wireless LAN device connected to
Wireless LAN access for detecting a wireless LAN access point whose received signal strength of the response is stronger than the received signal strength at the time of the wireless communication at the one wireless LAN access point among the other wireless LAN access points A wireless LAN device including a point detection unit.
請求項1に記載の無線LAN装置であって、
前記ある一つの無線LANアクセスポイントに、前記応答要求信号の送信を指示する送信指示部と、
前記別の無線LANアクセスポイントに、前記応答の受信の待機を指示する受信待機指示部と、
を備えた無線LAN装置。
The wireless LAN device according to claim 1,
A transmission instructing unit that instructs the one wireless LAN access point to transmit the response request signal;
A reception standby instruction unit that instructs the other wireless LAN access point to wait for reception of the response;
A wireless LAN device comprising:
請求項1に記載の無線LAN装置であって、
前記応答の受信の待機が、前記応答要求信号の送信と同時に開始する、
無線LAN装置。
The wireless LAN device according to claim 1,
Waiting for reception of the response starts simultaneously with transmission of the response request signal.
Wireless LAN device.
請求項1に記載の無線LAN装置であって、
前記応答の受信の待機が、前記別の無線LANアクセスポイントによる前記応答の受信より前に開始する、
無線LAN装置。
The wireless LAN device according to claim 1,
Waiting to receive the response starts before receiving the response by the another wireless LAN access point;
Wireless LAN device.
請求項1に記載の無線LAN装置であって、
前記応答の受信の待機は、前記別の無線LANアクセスポイントが前記応答のチャネルの信号を受信可能とすることである、
無線LAN装置。
The wireless LAN device according to claim 1,
The waiting for reception of the response is that the other wireless LAN access point can receive the signal of the channel of the response.
Wireless LAN device.
請求項1に記載の無線LAN装置であって、
前記応答要求信号は、ARP RequestまたはNull Dataである、
無線LAN装置。
The wireless LAN device according to claim 1,
The response request signal is ARP Request or Null Data.
Wireless LAN device.
請求項1に記載の無線LAN装置であって、
前記無線LANアクセスポイント検出部の検出結果が有る場合に、前記ある一つの無線LANアクセスポイントに対して、前記無線LAN通信端末との通信の切断を指示する通信切断指示部を備えた無線LAN装置。
The wireless LAN device according to claim 1,
A wireless LAN apparatus comprising a communication disconnection instruction unit that instructs the one wireless LAN access point to disconnect communication with the wireless LAN communication terminal when there is a detection result of the wireless LAN access point detection unit .
請求項1に記載の無線LAN装置であって、
前記無線LANアクセスポイント検出部の検出結果の内の一つを前記無線LAN通信端末に伝達する無線LAN装置。
The wireless LAN device according to claim 1,
A wireless LAN device that transmits one of detection results of the wireless LAN access point detection unit to the wireless LAN communication terminal.
ある一つの無線LANアクセスポイントであって、当該ある一つの無線LANアクセスポイントと無線通信を行っている無線LAN通信端末に対して、応答を要求する応答要求信号を送信するある一つの無線LANアクセスポイントと、
前記ある一つの無線LANアクセスポイントとは別の無線LANアクセスポイントであって、前記応答の受信の待機を、前記応答要求信号の送信の時点に応じて開始する別の無線LANアクセスポイントと、
に接続された無線LAN装置における通信処理方法であって、
前記別の無線LANアクセスポイントの中で、前記ある一つの無線LANアクセスポイントにおける前記無線通信の際の受信信号強度よりも、前記応答の受信信号強度が強い無線LANアクセスポイントを検出する無線LANアクセスポイント検出工程を備えた通信処理方法。
A certain wireless LAN access point that transmits a response request signal for requesting a response to a wireless LAN communication terminal that is performing wireless communication with the certain wireless LAN access point. Point and
A wireless LAN access point different from the one wireless LAN access point, wherein another wireless LAN access point that starts waiting for reception of the response according to the time of transmission of the response request signal;
A communication processing method in a wireless LAN device connected to
Wireless LAN access for detecting a wireless LAN access point whose received signal strength of the response is stronger than the received signal strength at the time of the wireless communication at the one wireless LAN access point among the other wireless LAN access points A communication processing method including a point detection step.
JP2016168181A 2016-08-30 2016-08-30 Wireless LAN device and communication processing method Active JP6806498B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016168181A JP6806498B2 (en) 2016-08-30 2016-08-30 Wireless LAN device and communication processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016168181A JP6806498B2 (en) 2016-08-30 2016-08-30 Wireless LAN device and communication processing method

Publications (2)

Publication Number Publication Date
JP2018037789A true JP2018037789A (en) 2018-03-08
JP6806498B2 JP6806498B2 (en) 2021-01-06

Family

ID=61567748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016168181A Active JP6806498B2 (en) 2016-08-30 2016-08-30 Wireless LAN device and communication processing method

Country Status (1)

Country Link
JP (1) JP6806498B2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003169061A (en) * 2001-11-29 2003-06-13 Infoware System Kk Small-electric-power lan system
JP2008034906A (en) * 2006-07-26 2008-02-14 Matsushita Electric Ind Co Ltd Wireless base station handover method and data communication system, and wireless base station and relaying apparatus
JP2009246499A (en) * 2008-03-28 2009-10-22 Fujitsu Ltd Base station device, base station management device, and base station management system
JP2009267719A (en) * 2008-04-24 2009-11-12 Kyocera Corp Radio communication system and communication method
JP2010093360A (en) * 2008-10-03 2010-04-22 Nec Infrontia Corp Wireless communication system and roaming method in same
WO2014113976A1 (en) * 2013-01-25 2014-07-31 富士通株式会社 Handover method based on uplink signal, method for configuring uplink signal, user equipment, and base station
US20150117414A1 (en) * 2013-10-30 2015-04-30 International Business Machines Corporation Handing off a terminal among wireless access points

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003169061A (en) * 2001-11-29 2003-06-13 Infoware System Kk Small-electric-power lan system
JP2008034906A (en) * 2006-07-26 2008-02-14 Matsushita Electric Ind Co Ltd Wireless base station handover method and data communication system, and wireless base station and relaying apparatus
JP2009246499A (en) * 2008-03-28 2009-10-22 Fujitsu Ltd Base station device, base station management device, and base station management system
JP2009267719A (en) * 2008-04-24 2009-11-12 Kyocera Corp Radio communication system and communication method
JP2010093360A (en) * 2008-10-03 2010-04-22 Nec Infrontia Corp Wireless communication system and roaming method in same
WO2014113976A1 (en) * 2013-01-25 2014-07-31 富士通株式会社 Handover method based on uplink signal, method for configuring uplink signal, user equipment, and base station
JP2016504885A (en) * 2013-01-25 2016-02-12 富士通株式会社 Handover method based on uplink signal, uplink signal configuration method, user apparatus, and base station
US20150117414A1 (en) * 2013-10-30 2015-04-30 International Business Machines Corporation Handing off a terminal among wireless access points

Also Published As

Publication number Publication date
JP6806498B2 (en) 2021-01-06

Similar Documents

Publication Publication Date Title
US9807813B2 (en) Probe response suppression
JP5153468B2 (en) Wireless communication apparatus and communication method thereof
US8411640B2 (en) Communication apparatus
US8194606B2 (en) Method for scanning access points during station's handoff procedure in wireless communication system and station performing the method, and network interface supporting the method and wireless communication system enabling the method
KR20160141829A (en) Method of controlling handover in mobile communication networks and apparatus and system emplementing the method
JP2009171506A (en) Radio communication device, control program of radio communication device, and radio communication system
US20150163836A1 (en) Communication apparatus, communication system, and computer-readable recording medium
KR20100084138A (en) Method for receiving data in wireless lan system using multiple channels
JP4807139B2 (en) Handover processing system and handover processing method
EP3351039B1 (en) Communication apparatus, control method, and computer-readable storage medium
US20190166537A1 (en) Communication apparatus, method for controlling communication apparatus, and storage medium
JP4046705B2 (en) Mobile communication support apparatus, mobile communication terminal, and mobile communication system
US20180262964A1 (en) Radio communication apparatus, radio communication system, connection management method, and non-transitory computer readable medium
JP6806498B2 (en) Wireless LAN device and communication processing method
KR102016692B1 (en) Method and its apparatus for connecting to access point in wireless lan system
JP2013058836A (en) Transmission device, transmission method, and program
US20220046518A1 (en) Communication apparatus, control method, and program
JP2020031368A (en) Terminal device, communication method, and program
JP6917687B2 (en) Wireless LAN controller and wireless LAN communication system
JP5483656B2 (en) COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM
JP5964804B2 (en) Mobile wireless device, wireless communication system, and wireless communication method
KR101422717B1 (en) Method and device for handoff of wireless communication system
JP5750520B2 (en) COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM
JP6361013B2 (en) Radio base station apparatus, radio communication system, and radio base station apparatus control method
JP2016192729A (en) Radio base station device, radio communication system, and radio base station device control method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190725

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200302

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200313

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200409

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200804

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200825

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20201201

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20201204

R150 Certificate of patent or registration of utility model

Ref document number: 6806498

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250